IKO - International Karate Organization - 20th All Japan Open Karate Championship (1988)
Open Kumite
| Rang | Catégorie | Champion | Pays |
| 1 | Open Kumite | Yasuhiro Kuwajima | Japan |
| 2 | Open Kumite | Yutaka Ishi | Japan |
| 3 | Open Kumite | Kenji Yamaki | Japan |
| 4 | Open Kumite | Tetsu Yamaguchi | Japan |
| 5 | Open Kumite | Mamoru Takahashi | Japan |
| 6 | Open Kumite | Hussain Kamal | Japan |
| 7 | Open Kumite | Makoto Kusakai | Japan |
| 8 | Open Kumite | Hideki Shibata | Japan |